Changes in mesh_triangle_holes.C for -Wshadow.
Changes in mesh_triangle_holes.C for -Wshadow.

Issue #24.

Mbewu/libmesh,Mbewu/libmesh,Mbewu/libmesh,Mbewu/libmesh,Mbewu/libmesh,Mbewu/libmesh,Mbewu/libmesh,Mbewu/libmesh,Mbewu/libmesh